The Unit of rate constant and rate of reaction are same for ______.

(a)

First order

(b)

second order

(c)

Third order

(d)

zero order

Which of the following statement is not correct?

(a)

Molecularity of a reaction cannot be fractional

(b)

Molecularity of a reaction cannot be more than three

(c)

Molecularity of a reaction can be zero

(d)

Molecularity is assigned for each elementary step of mechanism.

For an exothermic chemical process occurring in 2 steps as
(i) A +B ⟶ X (slow) ;
(ii) X ⟶  AB (fast)
The progress of the reaction can be best described by (x- intermediate).

(a)

(b)

(c)

(d)

None of these

Nitric oxide (NO) reacts wtih oxygen to produce nitrogen dioxide
2NO_(g) + O_2(g) ⟶ 2NO_2(g)
If the mechanism of reaction is ______.
NO + O₂ \(\overset { K }{ \rightleftharpoons } \) NO₃ (fast)
NO₃ + NO \(\overset { { K }_{ 1 } }{ \rightleftharpoons } \) NO₂ + NO₂ (slow)

(a)

Rate = K' [NO] [O₂]

(b)

Rate = K' [NO] [O₂]₂

(c)

Rate = K' [NO]² [O₂]

(d)

Rate = K' [NO]³ [O₂]

A reaction having equal activation energies for forward and reverse reactions has ______.

(a)

ΔG = 0

(b)

ΔH = 0

(c)

ΔH = ΔG = ΔS = 0

(d)

 ΔS = 0